Wizit Gateway for WooCommerce <= 1.3.1 - Missing Authentication to Unauthenticated Arbitrary Order Cancellation

The Wizit Gateway for WooCommerce plugin for WordPress is vulnerable to Unauthenticated Arbitrary Order Cancellation in all versions up to, and including, 1.3.1. This is due to a lack of authentication and authorization checks in the 'handle_checkout_redirecturl_response' function. This makes it possible for unauthenticated attackers to cancel arbitrary WooCommerce orders by sending a crafted request with a valid order ID.